Steam-boiler



7 (Application filed Dec. 28, 1898.)

N0. 624.7,9l. Patented May 9,1899. R. GREGG.

STEAM BOILER.

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.Patented May 9, I899.

n. GREGG. STEAM BOILER.

(Application filed Dec. 2-3, 1898.)

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RICHARD GREGG, OF OSWEGO, NEW YORK.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 624,791, dated May 9,1899.

Application filed December 23, 1898. Serial N0.,'700,092. (110 model.)

To to whom it may concern:

Be it known that I, RICHARD GREGG, of Oswego, in the county of Oswego,in the State of New York, have invented new and useful Improvements inSteam-Boilers, of which the following, taken in connection with theaccompanying drawings, is a full, clear, and exact description.

My invention relates to boilers, and more particularly to those of thelocomotive type.

My'object is to produce a locomotive-boiler (or other type, if desired)which is provided with water-fines, a fire-wall carried by them, a shellinclosing the water-fines and part of said fire-wall and creating apassage for the smoke or products of combustion from the 9 and in suchmanner as to create a channel, 1

fire-pot through, between, and around said fines and between them andsaid casing forward into a smoke-chamber in the front ofthe boiler, andthence to the rear end and to the stack opening or pipe throughsmoke-fines immersed in water, suitable water-legs being also providedto aid in creating and main taining free circulation of the water boththrough the water dues and around the smoke-fines. a

It is constructed as follows, reference being had to the accompanyingdrawings, in which Figure 1 is a longitudinal vertical section, partlyin elevation, of my boiler.- Fig. 2 is a vertical cross-section on linea: 00 in Fig. 1. Fig. 3 is a like View on line y y in Fig. 1.

The boiler comprises a suitable outer shell, a parallel inner wall 2,creating a water-leg 8 and having a fire-box 4, grate 5, ash-pit 6, withsuitable openings 7 and 8 for the fuel and ash=pit doors. Between thefire-box and a point near the front end the water-leg wall is carriedoverin the form of a cylinder at, the end 9 of which constitutes aflue-sheet in which the front ends of the water-fines 10 are set, theirrear ends being set in the Water-leg wall 2, thus connecting thewater-leg to the water-chamber 11 in the front end of the boiler andbetween it and the flue-sheet 9. The upper row of said water flues isshown as set upon an arc and as furnishing a support for the fire wallor partition 12, which extends forward from the rear end to a point moreor less closely adjacent to the flue-sheet conduit, or reverse passage13 for the smoke, which passes from the fire-box forward and upwardbetween the water-fines, to be conducted back into the smoke-chamber 14and thence forward through the smoke-fines 15 to the stack, which is notshown. These smoke-fines are set in the sheet 16 at the front end ofthis smoke-chamber and in the fluesheet 17 at the front end oftheboiler. A suitable manhole, cover, and fastening 18 is also provided.The smoke-fines are all belowthe water-level.

It will be seen that the water will circulate freely through thewater-legs, the water-fines, and the water-chamber and around the smoke*flues that the smoke passes from the fire-box up around the flues untilstopped by the firewall, thence forward to the front end of said walland to the flue-sheet 9, thence rearward through a more or lessconstricted passage into the smoke-chamber, and thence forward again tothe stack, in this manner the waterfiues being exposed to the directaction of the heat and the smoke-fines being heated to exert more orless efiect upon the water around them; that the flues are in twoindependent sets, the one set the water-finesreceiving the direct impactof the heat exteriorly and the others the direct impact interiorly, thewater-fines being for part of their length inclosed in a tubularsmoke-conduit and part of their length partially inolosed in afire-Wall, which also deflects the smoke and-causes it to take acircuitous course.

Having described my invention, what I claim, and desire to seizure byLetters Patent, 1s-

1. In a steam-boiler an outer shell, a firebox, a water-leg around it,an inner smokeshell forward of the fire-box, water-tubes set in theclosed front end of said smoke-shell, extending through the-fire-box andconnected to the water-leg, the top row of said tubes being set upon anarc, a fire-wall across said shell and supported by said row of fiuesand extending forward part way through said inner shell creating afire-flue between said partition and said inner shell conducting theproducts of combustion to a smoke=chamber above the fire-box, and a setof fire-tubes extending thence forward to the front end of the boiler tocarry off the smoke.

2. In a boiler, an outer shell, a fire-box, an inner smoke-shellextending forward from the fire-box, a row of water-tubes set upon anarc and extending through the fire-box and said shell, a fire-wallpartition extending through the fire-box above said water-tubes and intosaid shell, a reverse-flue between .said shell and said fire-wallopening into a smoke-chamber above said Wall, and a set of

